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            <h2 class="toc-title">目录</h2>
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        </div><article class="page single"><h1 class="single-title animated flipInX">08_K8S_交付实战-架构说明并准备zk集群</h1><div class="post-meta">
            <div class="post-meta-line"><span class="post-author"><a href="https://space.bilibili.com/394449264" title="Author" target="_blank" rel="noopener noreffer author" class="author"><i class="fas fa-user-circle fa-fw"></i>老男孩</a></span>&nbsp;<span class="post-category">收录于 <a href="/categories/%E8%BD%AC%E8%BD%BD/"><i class="far fa-folder fa-fw"></i>转载</a>&nbsp;<a href="/categories/k8s/"><i class="far fa-folder fa-fw"></i>K8S</a></span></div>
            <div class="post-meta-line"><i class="far fa-calendar-alt fa-fw"></i>&nbsp;<time datetime="2020-10-01">2020-10-01</time>&nbsp;<i class="fas fa-pencil-alt fa-fw"></i>&nbsp;约 1295 字&nbsp;
                <i class="far fa-clock fa-fw"></i>&nbsp;预计阅读 3 分钟&nbsp;<span id="/08_k8s_%E4%BA%A4%E4%BB%98%E5%AE%9E%E6%88%98-%E6%9E%B6%E6%9E%84%E8%AF%B4%E6%98%8E%E5%B9%B6%E5%87%86%E5%A4%87zk%E9%9B%86%E7%BE%A4/" class="leancloud_visitors" data-flag-title="08_K8S_交付实战-架构说明并准备zk集群">
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                    <span>目录</span>
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                <div class="details-content toc-content" id="toc-content-static"><nav id="TableOfContents">
  <ul>
    <li><a href="#1-交付的服务架构图">1 交付的服务架构图：</a>
      <ul>
        <li><a href="#11-架构图解">1.1 架构图解</a></li>
        <li><a href="#12-交付说明">1.2 交付说明:</a></li>
      </ul>
    </li>
    <li><a href="#2-部署zk集群">2 部署ZK集群</a>
      <ul>
        <li><a href="#21-二进制安装jdk">2.1 二进制安装JDK</a>
          <ul>
            <li><a href="#211-解压jdk">2.1.1 解压jdk</a></li>
            <li><a href="#212-写入环境变量">2.1.2 写入环境变量</a></li>
          </ul>
        </li>
      </ul>
    </li>
    <li><a href="#22-二进制安装zk">2.2 二进制安装zk</a>
      <ul>
        <li>
          <ul>
            <li><a href="#221-下载zookeeper">2.2.1 下载zookeeper</a></li>
            <li><a href="#222-创建zk配置文件">2.2.2 创建zk配置文件：</a></li>
            <li><a href="#223-创建集群配置">2.2.3 创建集群配置</a></li>
            <li><a href="#224-修改dns解析">2.2.4 修改dns解析</a></li>
          </ul>
        </li>
        <li><a href="#23-启动zk集群">2.3 启动zk集群</a></li>
        <li><a href="#231-启动zookeeper">2.3.1 启动zookeeper</a>
          <ul>
            <li><a href="#232-检查zk启动情况">2.3.2 检查zk启动情况</a></li>
            <li><a href="#233-检查zk集群情况">2.3.3 检查zk集群情况</a></li>
          </ul>
        </li>
      </ul>
    </li>
    <li><a href="#3-准备java运行底包">3 准备java运行底包</a>
      <ul>
        <li><a href="#31-拉取原始底包">3.1 拉取原始底包</a></li>
        <li><a href="#32-制作新底包">3.2 制作新底包</a>
          <ul>
            <li><a href="#321-制作dockerfile">3.2.1 制作dockerfile</a></li>
            <li><a href="#322准备dockerfile需要的文件">3.2.2准备dockerfile需要的文件</a></li>
            <li><a href="#323-构建底包并上传">3.2.3 构建底包并上传</a></li>
          </ul>
        </li>
      </ul>
    </li>
  </ul>
</nav></div>
            </div><div class="content" id="content"><h1 id="08_k8s_交付实战-架构说明并准备zk集群">08_K8S_交付实战-架构说明并准备zk集群</h1>
<h2 id="1-交付的服务架构图">1 交付的服务架构图：</h2>
<p><img
        class="lazyload"
        src="/svg/loading.min.svg"
        data-src="https://jyd01.oss-cn-beijing.aliyuncs.com/uPic/1601204138577-068b05f7-606f-40ee-b174-a18a1b7138f5.png"
        data-srcset="https://jyd01.oss-cn-beijing.aliyuncs.com/uPic/1601204138577-068b05f7-606f-40ee-b174-a18a1b7138f5.png, https://jyd01.oss-cn-beijing.aliyuncs.com/uPic/1601204138577-068b05f7-606f-40ee-b174-a18a1b7138f5.png 1.5x, https://jyd01.oss-cn-beijing.aliyuncs.com/uPic/1601204138577-068b05f7-606f-40ee-b174-a18a1b7138f5.png 2x"
        data-sizes="auto"
        alt="https://jyd01.oss-cn-beijing.aliyuncs.com/uPic/1601204138577-068b05f7-606f-40ee-b174-a18a1b7138f5.png"
        title="https://jyd01.oss-cn-beijing.aliyuncs.com/uPic/1601204138577-068b05f7-606f-40ee-b174-a18a1b7138f5.png" /></p>
<h3 id="11-架构图解">1.1 架构图解</h3>
<ol>
<li>最上面一排为K8S集群外服务
1.1 代码仓库使用基于git的gitee
1.2 注册中心使用3台zk组成集群
1.3 用户通过ingress暴露出去的服务进行访问</li>
<li>中间层是K8S集群内服务
2.1 jenkins以容器方式运行,数据目录通过共享磁盘做持久化
2.2 整套dubbo微服务都以POD方式交付,通过zk集群通信
2.3 需要提供的外部访问的服务通过ingress方式暴露</li>
<li>最下层是运维主机层
3.1 harbor是docker私有仓库,存放docker镜像
3.2 POD相关yaml文件创建在运维主机特定目录
3.3 在K8S集群内通过nginx提供的下载连接应用yaml配置</li>
</ol>
<h3 id="12-交付说明">1.2 交付说明:</h3>
<p>docker虽然可以部署有状态服务,但如果不是有特别需要,还是建议不要部署有状态服务
K8S同理,也不建议部署有状态服务，如mysql，zk等。
因此手动将zookeeper创建集群提供给dubbo使用</p>
<h2 id="2-部署zk集群">2 部署ZK集群</h2>
<p>集群分布：7-11，7-12，7-21
zk是java服务，需要依赖jdk</p>
<h3 id="21-二进制安装jdk">2.1 二进制安装JDK</h3>
<p>jdk请自行下载,只要是1.8版本的就可以,rpm安装或二进制安装均可：</p>
<h4 id="211-解压jdk">2.1.1 解压jdk</h4>
<div class="highlight"><div class="chroma">
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">mkdir /opt/src
mkdir /usr/java
cd /opt/src
tar -xf jdk-8u221-linux-x64.tar.gz -C /usr/java/
ln -s /usr/java/jdk1.8.0_221/ /usr/java/jdk
</code></pre></td></tr></table>
</div>
</div><h4 id="212-写入环境变量">2.1.2 写入环境变量</h4>
<div class="highlight"><div class="chroma">
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">cat &gt;&gt;/etc/profile &lt;&lt;&#39;EOF&#39;
#JAVA HOME
export JAVA_HOME=/usr/java/jdk
export PATH=$JAVA_HOME/bin:$JAVA_HOME/bin:$PATH
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
EOF
# 使环境变量生效
source /etc/profile
</code></pre></td></tr></table>
</div>
</div><p>验证结果</p>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">[root@hdss7-11 ~]# java -version
java version &#34;1.8.0_221&#34;
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)
</code></pre></td></tr></table>
</div>
</div><h2 id="22-二进制安装zk">2.2 二进制安装zk</h2>
<h4 id="221-下载zookeeper">2.2.1 下载zookeeper</h4>
<p><a href="https://archive.apache.org/dist/zookeeper/" target="_blank" rel="noopener noreffer">下载地址</a></p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz
tar -zxf zookeeper-3.4.14.tar.gz -C /opt/
ln -s /opt/zookeeper-3.4.14/ /opt/zookeeper
</code></pre></td></tr></table>
</div>
</div><h4 id="222-创建zk配置文件">2.2.2 创建zk配置文件：</h4>
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<td class="lntd">
<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">cat &gt;/opt/zookeeper/conf/zoo.cfg &lt;&lt;&#39;EOF&#39;
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data/zookeeper/data
dataLogDir=/data/zookeeper/logs
clientPort=2181
server.1=zk1.zq.com:2888:3888
server.2=zk2.zq.com:2888:3888
server.3=zk3.zq.com:2888:3888
EOF
</code></pre></td></tr></table>
</div>
</div><p>创建相关目录</p>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">mkdir -p /data/zookeeper/data
mkdir -p /data/zookeeper/logs
</code></pre></td></tr></table>
</div>
</div><h4 id="223-创建集群配置">2.2.3 创建集群配置</h4>
<p>给每个zk不同的myid,以便区分主从</p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">#7-11上
echo 1 &gt; /data/zookeeper/data/myid
#7-12上
echo 2 &gt; /data/zookeeper/data/myid
#7-21上
echo 3 &gt; /data/zookeeper/data/myid
</code></pre></td></tr></table>
</div>
</div><h4 id="224-修改dns解析">2.2.4 修改dns解析</h4>
<p>到<code>7.11</code>上增加dns解析记录</p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">vi /var/named/zq.com.zone
...
zk1        A    10.4.7.11
zk2        A    10.4.7.12
zk3        A    10.4.7.21
#验证结果
~]# dig -t A zk1.zq.com  +short
10.4.7.11
</code></pre></td></tr></table>
</div>
</div><h3 id="23-启动zk集群">2.3 启动zk集群</h3>
<h3 id="231-启动zookeeper">2.3.1 启动zookeeper</h3>
<p>在每台zk机器上都执行此操作</p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">/opt/zookeeper/bin/zkServer.sh start
</code></pre></td></tr></table>
</div>
</div><h4 id="232-检查zk启动情况">2.3.2 检查zk启动情况</h4>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">~]# ss -ln|grep 2181
tcp    LISTEN     0      50       :::2181                 :::*
</code></pre></td></tr></table>
</div>
</div><h4 id="233-检查zk集群情况">2.3.3 检查zk集群情况</h4>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">[root@hdss7-11 ~]# /opt/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: follower
[root@hdss7-12 ~]# /opt/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: leader
[root@hdss7-21 ~]# /opt/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: follower
</code></pre></td></tr></table>
</div>
</div><p>到此，zookeeper集群就搭建好了。</p>
<h2 id="3-准备java运行底包">3 准备java运行底包</h2>
<p>运维主机上操作</p>
<h3 id="31-拉取原始底包">3.1 拉取原始底包</h3>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">docker pull stanleyws/jre8:8u112
docker tag fa3a085d6ef1 harbor.zq.com/public/jre:8u112
docker push harbor.zq.com/public/jre:8u112
</code></pre></td></tr></table>
</div>
</div><h3 id="32-制作新底包">3.2 制作新底包</h3>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">mkdir -p /data/dockerfile/jre8/
cd /data/dockerfile/jre8/
</code></pre></td></tr></table>
</div>
</div><h4 id="321-制作dockerfile">3.2.1 制作dockerfile</h4>
<div class="highlight"><div class="chroma">
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">cat &gt;Dockerfile &lt;&lt;&#39;EOF&#39;
FROM harbor.zq.com/public/jre:8u112
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime &amp;&amp;\
    echo &#39;Asia/Shanghai&#39; &gt;/etc/timezone
ADD config.yml /opt/prom/config.yml
ADD jmx_javaagent-0.3.1.jar /opt/prom/
WORKDIR /opt/project_dir
ADD entrypoint.sh /entrypoint.sh
CMD [&#34;sh&#34;,&#34;/entrypoint.sh&#34;]
EOF
</code></pre></td></tr></table>
</div>
</div><h4 id="322准备dockerfile需要的文件">3.2.2准备dockerfile需要的文件</h4>
<p><strong>添加config.yml</strong>
此文件是为后面用普罗米修斯监控做准备的</p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">cat &gt;config.yml &lt;&lt;&#39;EOF&#39;
---
rules:
 - pattern: &#39;.*&#39;
EOF
</code></pre></td></tr></table>
</div>
</div><p><strong>下载jmx_javaagent,监控jvm信息：</strong></p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.3.1/jmx_prometheus_javaagent-0.3.1.jar -O jmx_javaagent-0.3.1.jar
</code></pre></td></tr></table>
</div>
</div><p><strong>创建entrypoint.sh启动脚本：</strong>
使用exec 来运行java的jar包，能够使脚本将自己的pid 为‘1’ 传递给java进程，避免docker容器因没有前台进程而退出。并且不要加&amp;符。</p>
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<pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash">cat &gt;entrypoint.sh <span class="s">&lt;&lt;&#39;EOF&#39;
</span><span class="s">#!/bin/sh
</span><span class="s">M_OPTS=&#34;-Duser.timezone=Asia/Shanghai -javaagent:/opt/prom/jmx_javaagent-0.3.1.jar=$(hostname -i):${M_PORT:-&#34;12346&#34;}:/opt/prom/config.yml&#34;
</span><span class="s">C_OPTS=${C_OPTS}
</span><span class="s">JAR_BALL=${JAR_BALL}
</span><span class="s">exec java -jar ${M_OPTS} ${C_OPTS} ${JAR_BALL}
</span><span class="s">EOF</span>
</code></pre></td></tr></table>
</div>
</div><h4 id="323-构建底包并上传">3.2.3 构建底包并上传</h4>
<p>在harbor中创建名为<code>base</code>的公开仓库,用来存放自己自定义的底包</p>
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<pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">docker build . -t harbor.zq.com/base/jre8:8u112
docker push  harbor.zq.com/base/jre8:8u112
</code></pre></td></tr></table>
</div>
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